| GPM和TRMM卫星日降水数据在黄河源区的适用性分析 |
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| 引用本文： | 刘兆晨,杨梅学,王学佳,程立真.GPM和TRMM卫星日降水数据在黄河源区的适用性分析[J].冰川冻土,2020,42(2):575-586. |
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| 作者姓名： | 刘兆晨 杨梅学 王学佳 程立真 |
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| 作者单位： | 1.中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室，甘肃 兰州 730000;2.中国科学院大学，北京 100049 |
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| 基金项目： | 国家自然科学基金项目(41771068);中国科学院战略性先导科技专项（A类）项目(XDA20100102);中国科学院“西部之光”青年学者B类项目;中国科学院青年创新促进会(2018460) |
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| 摘 要： | 通过评估GPM计划三种日降水产品（IMERG-E、 IMERG-L和IMERG-F）和TRMM卫星、 两种日降水产品（TMPA 3B42和TMPA 3B42RT）在黄河源及其周边区域38个台站的适用性， 探究了五种产品探测精度和海拔高度及雨强的相关关系， 结果表明： 在与实测资料的一致性和偏差方面， GPM卫星产品要全面优于TMPA产品。在TRMM卫星产品中， 3B42产品明显优于3B42RT。五种产品的相关系数均表现出明显的从东南到西北递减的趋势， 均方根误差北部普遍低于南部。IMERG产品的探测率（POD）和探测成功率（CSI）都要普遍高于TMPA产品， 而误报率（FAR）则是TMPA 产品更低， 表现更好。五种产品均在个别台站出现了严重误报的情况， 这些台站主要分布在研究区的西北部。IMERG三种产品对于海拔高度的依赖程度具有很强的一致性， 而3B42RT产品对海拔高度几乎没有依赖。除3B42RT产品外， 其余四种产品的偏差均随雨强的增加而增大。在探测率方面， IMERG产品对小雨、 中雨和大雨的探测能力均优于TMPA产品。
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| 关 键 词： | 降水 GPM TRMM 黄河源区 空间特征 |
| 收稿时间： | 2018-10-28 |
| 修稿时间： | 2019-12-19 |
The GPM and TRMM satellite-based precipitation products applied in the source regions of the Yellow River |
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| Zhaochen LIU,Meixue YANG,Xuejia WANG,Lizhen CHENG.The GPM and TRMM satellite-based precipitation products applied in the source regions of the Yellow River[J].Journal of Glaciology and Geocryology,2020,42(2):575-586. |
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| Authors: | Zhaochen LIU Meixue YANG Xuejia WANG Lizhen CHENG |
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| Institution: | 1.State Key Laboratory of Cryospheric Science，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China;2.University of Chinese Academy of Sciences，Beijing 100049，China |
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| Abstract: | In this study， we have evaluated three satellite rainfall products （IMERG-E/IMERG-L/IMERG-F） from Global Precipitation Measurement （GPM） and two satellite rainfall products （TMPA 3B24 and 3B42RT） from Tropical Rainfall Measuring Mission （TRMM） in the source regions of the Yellow River in daily scale， with special focus on the dependence of performance on spatial distribution and rainfall intensity. Daily rainfall data series from 38 gauge stations has been used. Results indicate that： （1） GPM products outperform TRMM products in both consistency and deviation with gauge observation data， while 3B42 is better than 3B42RT. The correlation coefficients between five products and gauge observation show significant decline from southeast to northwest， while the RMSE in northern regions are larger than in southern regions generally. （2） In terms of the ability of rainfall detection， probability of detection and critical success index of IMERG products are both larger than those of TMPA products， while false alarming ratio of IMERG products are larger than that of TMPA products. High false alarm rates are occurred in every product at individual stations. These stations are almost located in the northwestern regions. （3） The performance of IMERG products is negatively correlated with elevation， while that of TMPA products has not obvious correlation with elevation. （4） The deviation of all products is positively correlated with the rainfall intensity except for 3B42RT. In terms of probability of detection， IMERG products are much better than TMPA products whether in light rainfall events， moderate rainfall events or heavy rainfall events. |
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| Keywords: | precipitation GPM TRMM the source regions of Yellow River spatial distribution |
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